The ph scale and Universal Indicator 3.0 / 5 based on 1 rating ? ChemistryAcids, bases and saltsGCSEEdexcel Created by: SaifCreated on: 12-11-12 20:10 Strong Acid (RED) 1 1 of 5 Strong Alkali (PURPLE) 14 2 of 5 neutrual (GREEN) 7 3 of 5 weak Acid (ORANGE) 5 4 of 5 Weak Alkali ( BLUE - PURPLE) 9 5 of 5
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